Elizabeth Peabody Essays - Transcendentalism, Civil Disobedience

Elizabeth Peabody Essays - Transcendentalism, Civil Disobedience Elizabeth Peabody Teacher and educational reformer, founder of the kindergarten in America, abolitionist, opponent of European autocratic despotism, friend of political refugees, advocate of Native American rights and education, of woman's suffrage, and of world peace, Miss Peabody worked unceasingly toward the improvement of society. In the 1840s, she ran a circulating library and bookstore at 13 West Street in Boston, providing the Transcendentalists (see previous article on Transcendentalism here) with a gathering place and with volumes of foreign literature and philosophy. Margaret Fuller conducted her famous conversations at 13 West Street. The Brook Farm utopian community was planned there. Moreover, Elizabeth Peabody was a publisher at a time when few women were involved in that business. Among the titles issued under her name were Dr. William Ellery Channing's Emancipation (1840), Hawthorne's Grandfather's Chair, Famous Old People, and Liberty Tree (1841), two of the four volumes of the Transc endental periodical the Dial (1842 and 1843), and the short-lived Aesthetic Papers (1849), which included the first appearance in print of Thoreau's Civil Disobedience. Miss Peabody was also a gifted linguist, familiar with some dozen languages, and a prolific writer on education, reform, language, history, art, and other topics. Bibliography tappedin.org/info/teachers/peabody.htm

Conjugate Definition in Chemistry

Conjugate Definition in Chemistry In chemistry, there are three possible definitions of the term conjugate. Three Types of Conjugates (1) A conjugate refers to a compound formed by the joining of two or more chemical compounds. (2) In the Bronsted-Lowry theory of acids and bases, the term conjugate refers to an acid and base that differ from each other by a proton. When an acid and base react, the acid forms its conjugate base while the base forms it conjugate acid: acid base ⇆ conjugate base conjugate acid For an acid HA, the equation is written: HA B ⇆ A- HB The reaction arrow points both left and right because the reaction at equilibrium occurs in both the forward direction to form products and the reverse direction to convert products back into reactants. The acid loses a proton to become its conjugate base A- as the base B accepts a proton to become its conjugate acid HB. (3) Conjugation is the overlap of p-orbitals across a ÏÆ' bond (sigma bond). In transition metals, d-orbitals may overlap. The orbitals have delocalized electrons when there are alternating single and multiple bonds in a molecule. Bonds alternate in a chain so long as each atom has an available p-orbital. Conjugation tends to lower the energy of the molecule and increase its stability.   Conjugation is common in conducting polymers, carbon nanotubules, graphene, and graphite. Its seen in many organic molecules. Among other applications, conjugated systems can form chromophores. Chromophores are molecules that can absorb certain wavelengths of light, leading them to be colored. Chromophores are found in dyes, the photoreceptors of the eye, and glow in the dark pigments.